module Fog
  module Compute
    class Vsphere
      class Real

        def add_vm_interface(vmid, options = {})
          raise ArgumentError, "instance id is a required parameter" unless vmid

          interface=get_interface_from_options(vmid, options)
          vm_reconfig_hardware('instance_uuid' => vmid, 'hardware_spec' => {'deviceChange'=>[create_interface(interface)]})
        end

        def destroy_vm_interface(vmid, options = {})
          raise ArgumentError, "instance id is a required parameter" unless vmid

          interface=get_vm_interface(vmid, options)
          vm_reconfig_hardware('instance_uuid' => vmid, 'hardware_spec' => {'deviceChange'=>[create_interface(interface, interface.key, :remove)]})
        end
        
        def update_vm_interface(vmid, options = {})
          raise ArgumentError, "instance id is a required parameter" unless vmid

          interface=get_vm_interface(vmid, options)
          vm_reconfig_hardware('instance_uuid' => vmid, 'hardware_spec' => {'deviceChange'=>[create_interface(interface, interface.key, :edit)]})          
        end

        private
        def get_interface_from_options(vmid, options)
          if options and options[:interface]
            options[:interface]
          elsif options[:key] and options[:key]>0
            oldattributes=get_vm_interface(vmid, options)
            Fog::Compute::Vsphere::Interface.new oldattributes.merge options
          elsif options[:type] and options[:network]
            Fog::Compute::Vsphere::Interface.new options
          else
            raise ArgumentError, "interface is a required parameter or pass options with type and network"
          end
        end

      end

      class Mock
        def add_vm_interface(vmid, options = {})
          raise ArgumentError, "instance id is a required parameter" unless vmid
          raise ArgumentError, "interface is a required parameter" unless options and options[:interface]
          true
        end

        def destroy_vm_interface(vmid, options = {})
          raise ArgumentError, "instance id is a required parameter" unless vmid
          raise ArgumentError, "interface is a required parameter" unless options and options[:interface]
          true
        end
      end
    end
  end
end